Hi everyone,I am new to salesforce and I'm having trouble with a test class. I'm passing a value to the target class variable but when the SOQL query executes, it returns "System.QueryException: List has no rows for assignment to SObject". Please help


Apex Class

global class MembershipContractPreview_ctrl { 
    public String save { get; set; } 
    public String imgSource{get;set;}
    public String selectedSobject {get;set;}
    public Account objAccount {get;set;}
    public Account acc{get;set;}
    public list<MappingWrapper> listMappingWrapper{get;set;}
    public list<string> objects {get;set;}
    public string editSelectedObject {get;set;}
    public list<SelectOption> selectedObjfields {get;set;}
    public string selectedObj {get;set;}
    public Integer index {get;set;}
    public string membershipType{ get;set; }
    public string frequency{ get;set; }
    public string quantities{ get;set; }
    public string members{ get;set; }  
    public string contractDownloadLink{get;set;}
    
    public MembershipContractPreview_ctrl () { 
        //isContractSigned = false;
        frequency = apexpages.currentpage().getparameters().get('token');
        system.debug('>>>>>>>>>>>>>>>>>>>>'+apexpages.currentpage().getparameters().get('token'));
        selectedObjfields = new list<SelectOption>();
        selectedSobject = 'Account';
        init();
    }
    
    
    public void onUpdate(){
        Account acc = new Account(Id = objAccount.Id);
        if(null != imgSource){
            acc.Signature__c='<img src="'+imgSource+'" width="230px" height="71px"></img>';
            acc.Signature_Date__c = system.Now();
            objAccount.Signature__c ='<img src="'+imgSource+'" width="230px" height="71px"></img>';
            objAccount.Signature_Date__c = system.Now();
            //isContractSigned = true;
        }
        //acc.Patient_Type__c = 'Member';
        //acc.Membership_Level__c = 'Child';
        //acc.Membership_Type__c = membershipType;
        //acc.Quantity__c= '1';
        update acc;
        //sendAndUploadContract();//acc.Id);
    }
    
    public void sendAndUploadContract(){
        PageReference pdf = Page.Membershipformpdf;
        // add parent id to the parameters for standardcontroller
        pdf.getParameters().put('id',objAccount.Id);        
        // create the new attachment
        Attachment attach = new Attachment();    
        // the contents of the attachment from the pdf
        Blob body;        
        try {            
            // returns the output of the page as a PDF
            body = pdf.getContent();            
        // need to pass unit test -- current bug    
        } catch (VisualforceException e) {
            body = Blob.valueOf('Is you do not recieve correctly Formated contract, Please contact to Receptionist!');
        }
        ContentVersion conVer = new ContentVersion();
        conVer.ContentLocation = 'S'; // S specify this document is in SF, use E for external files
        conVer.PathOnClient = 'MHC Membership contract_Oct 2018.pdf'; // The files name, extension is very important here which will help the file in preview.
        conVer.Title = 'MHC Membership contract_Oct 2018.pdf'; // Display name of the files
        conVer.VersionData = body;//EncodingUtil.base64Decode(body); // converting your binary string to Blog
        insert conVer;
        Id conDoc = [SELECT ContentDocumentId FROM ContentVersion WHERE Id =:conVer.Id].ContentDocumentId;
        contractDownloadLink = 'https://dev-myhealthcaretestenv.cs89.force.com/sfc/servlet.shepherd/version/download/'+conVer.Id+'?asPdf=false&operationContext=CHATTER';     
        //Create ContentDocumentLink
        ContentDocumentLink cDe = new ContentDocumentLink();
        cDe.ContentDocumentId = conDoc;
        cDe.LinkedEntityId = objAccount.Id; // you can use objectId,GroupId etc
        cDe.ShareType = 'I'; // Inferred permission, checkout description of ContentDocumentLink object for more details
        cDe.Visibility = 'AllUsers';//'InternalUsers';
        insert cDe;
        list<Messaging.SingleEmailMessage> messagingList = new List<Messaging.SingleEmailMessage>();
        Messaging.SingleEmailMessage mail =  new Messaging.SingleEmailMessage();  
        list<String> toAddresses = new list <string>{'usman.sfdc@gmail.com','pintub.sfdc@gmail.com'};
        list<String> ccAddresses = System.Label.GoCardless_CC_Email_Address.split(',');
        mail.setCcAddresses(ccAddresses);
        mail.setToAddresses(toAddresses); 
        mail.setSubject(String.Format(System.Label.GoCardless_Email_Subject, new list<String>{'Test 123'}));
        mail.setHtmlBody(String.Format(System.Label.GoCardless_Email_Body, new list<String>{'Test 123'}));
        List<Messaging.Emailfileattachment> fileAttachments = new List<Messaging.Emailfileattachment>();        
        // Add to attachment file list
        Messaging.Emailfileattachment efa = new Messaging.Emailfileattachment();
        efa.setFileName('MHC Membership contract_Oct 2018.pdf');
        efa.setBody(conVer.VersionData);
        fileAttachments.add(efa);
        mail.setFileAttachments(fileAttachments);
        messagingList.add(mail);
        if(!messagingList.isEmpty()){
            Messaging.sendEmail(messagingList);
        }
    }
         
    public void init(){
        string objSobject = '';
        objects = new list<string>();
        objAccount = [select Name,Patient_Type__c ,Quantity__c,Billing_Address__c,List_Of_Members_Covered_By_The_Contract__c,Membership_Start_Date__c ,ContactId__c,
                      Membership_Change_Dates__c,Signature__c,Signature_Date__c,Contract_Sent_Date__c,Total_Monthly_Membership_Fee__c,Home_Clinic__c ,Membership_Type__c ,
                      Membership_Level__c ,Payment_Frequency__c, (Select Id, ContentDocumentId From ContentDocumentLinks order by ContentDocument.CreatedDate DESC limit 1)  from Account where id=:apexpages.currentpage().getparameters().get('token')];
        listMappingWrapper = new list<MappingWrapper>{new MappingWrapper()};
        if(objAccount != null && objAccount.ContentDocumentLinks.size() > 0){
            contractDownloadLink = 'https://dev-myhealthcaretestenv.cs89.force.com/sfc/servlet.shepherd/version/download/'+[SELECT Id FROM ContentVersion WHERE ContentDocumentId=:objAccount.ContentDocumentLinks.get(0).ContentDocumentId limit 1].Id+'?asPdf=false&operationContext=CHATTER';    
        }        
        if(Apexpages.currentPage().getParameters().get('editSelectedObject') == null){ 
            objSobject = selectedSobject ;  
        }else{
            objSobject = Apexpages.currentPage().getParameters().get('editSelectedObject'); 
        } 
    }
    public class MappingWrapper{
        public string member{get;set;}
        public string quantity{get;set;}
        public MappingWrapper(){}
        public MappingWrapper(string member,string quantity){
            this.member = member;
            this.quantity = quantity;
        }
    }
    public void addMember(){
        listMappingWrapper.add(new MappingWrapper());
    }
    public void removeMember(){
        listMappingWrapper.remove(index);
    }
    public List<SelectOption> getMembersPicklist(){
        List<SelectOption> options = new List<SelectOption>();            
        Schema.DescribeFieldResult fieldResult =
        Account.Membership_Level__c.getDescribe();
        List<Schema.PicklistEntry> ple = fieldResult.getPicklistValues();            
        for( Schema.PicklistEntry f : ple){
          options.add(new SelectOption(f.getLabel(), f.getValue()));
        }       
        return options;
    }
    
    public List<SelectOption> getQuantitiesPicklist(){
        List<SelectOption> options = new List<SelectOption>();            
        Schema.DescribeFieldResult fieldResult =
        Account.Quantity__c.getDescribe();
        List<Schema.PicklistEntry> ple = fieldResult.getPicklistValues();            
        for( Schema.PicklistEntry f : ple){
          options.add(new SelectOption(f.getLabel(), f.getValue()));
        }       
        return options;
    } 
    
    public List<SelectOption> getFrequencyPicklist(){
        List<SelectOption> options = new List<SelectOption>();            
        Schema.DescribeFieldResult fieldResult =
        Account.Payment_Frequency__c.getDescribe();
        List<Schema.PicklistEntry> ple = fieldResult.getPicklistValues();            
        for( Schema.PicklistEntry f : ple){
          options.add(new SelectOption(f.getLabel(), f.getValue()));
        }       
        return options;
    }
    
    public List<SelectOption> getMembershipTypePicklist(){
        List<SelectOption> options = new List<SelectOption>();            
        Schema.DescribeFieldResult fieldResult =
        Account.Membership_Type__c.getDescribe();
        List<Schema.PicklistEntry> ple = fieldResult.getPicklistValues();            
        for( Schema.PicklistEntry f : ple){
          options.add(new SelectOption(f.getLabel(), f.getValue()));
        }       
        return options;
    }
    public void sendEmail(){}
    public pageReference onSend(){ 
        pageReference pr = new pageReference('/'+objAccount.Id);
        pr.setRedirect(true);    
        Messaging.SingleEmailMessage mail = new Messaging.SingleEmailMessage();
        mail.setTargetObjectId(objAccount.ContactId__c);
        mail.setTemplateId('00X0E000000rjg7'); 
        mail.setWhatId(objAccount.Id);    
        mail.setBccSender(false);
        mail.setReplyTo('Laxminarayan.sfdc@gmail.com');
        mail.setToAddresses(new List<String>{'usman.sfdc@gmail.com'});
        mail.setSenderDisplayName('Membership Contract from MyHealthCare Clinic');
        mail.setSaveAsActivity(false); 
        Messaging.sendEmail(new Messaging.SingleEmailMessage[] { mail }); 
        Account ac2Update = new Account(id=objAccount.Id);
        ac2Update.Contract_Sent_Date__c = System.Now();
        ac2Update.Member_Status__c = 'Pending'; 
        Update ac2Update;
        return pr;
    }         
}


Test class 

@isTest
private class MembershipContractPreview_ctrl_Test{
     static testMethod void membercontract(){
   Test.startTest();
  MembershipContractPreview_ctrl memC = new MembershipContractPreview_ctrl();
   MembershipContractPreview_ctrl.MappingWrapper mw = new MembershipContractPreview_ctrl.MappingWrapper();
       mw.member = 'member';
        mw.quantity = 'quantity';
        Account objacc = new Account();
         objacc.Patient_Type__c = 'Member';
         //objacc.Name = 'Member'; 
         objacc.List_Of_Members_Covered_By_The_Contract__c = 'Member';
         objacc.Membership_Start_Date__c  = system.Today();
         objacc.Membership_Change_Dates__c = system.Today(); 
         //objacc.Home_Clinic__c = 'fulham'; 
         //objacc.Membership_Level__c = 'Child';
         //objacc.Membership_Type__c = 'MHC GP' ;
         objacc.Quantity__c = '1';
         //objacc.Payment_Frequency__c = 'Annual';
         //objacc.Billing_Address__c = 'Member';
         //objacc.ContactId__c = cont.id; 
         objacc.Contract_Sent_Date__c = system.Today();
         //objacc.Total_Monthly_Membership_Fee__c = 1000;
         objacc.Membership_Change_Dates__c = system.Today();
         
         objacc.LastName = 'fulham'; 
         objacc.Date_of_Birth__c = system.Today();
         objacc.Gender__c = 'Male' ;
         objacc.Patient_Type__c = 'New'; 
         insert objacc ;
         Account acc = new Account(Id = objacc.Id);
         objacc.Signature__c = 'Member';
         objacc.Signature_Date__c = system.Today();
         update objacc;
         ContentVersion ContentVer = new ContentVersion();
        ContentVer.Title = 'My Doc';
        ContentVer.ContentUrl= 'test.com';
        Insert ContentVer;
        // Create a ContentDocumentLink
        ContentDocumentLink ContentDL = new ContentDocumentLink();
        ContentDL.ContentDocumentId = [SELECT Id, ContentDocumentId FROM ContentVersion WHERE Id =: ContentVer.Id].ContentDocumentId;
        ContentDL.LinkedEntityId = objacc.id;
        ContentDL.ShareType='V';
        Insert ContentDL;
        // Retrieve ?
        ContentDL = [SELECT Id,ShareType FROM ContentDocumentLink WHERE Id =:ContentDL.Id];
        System.debug('Troll ' + ContentDL.ShareType);
        // Verify the share type is = i
        System.assertEquals('V',ContentDL.ShareType);
        
         PageReference pageRef = Page.MembershipContractPreview;
         pageRef.getParameters().put('id',objacc.id);
         ApexPages.StandardController sc = new ApexPages.StandardController(objacc);
         
         //Test.setCurrentPageReference(pageRef);
         memC.init();
         memC.onUpdate();
         memC.sendAndUploadContract();
        
        Test.stopTest();
   }
   
 }